Sash balance



Oct. 28, 1941. v J, BELCHER 2,260,965

Harv/0 f Be/Cbr A itomey In ventor Oct. 28, 1941. H. J. BELCHER I 2,260,965

' SASH BALANCE Filed Aug. 21, 1940 2 Sheets-Sheet 2 Inventor Hera/0 BG/C'Aer lfiomey Patented Oct. 28, 1941 i 3 V i UNITED STATES PATENT .orricg. 2,260,955 I V .sAsH BALANCE Q:

Harold J. gelcherfhlgierspL V 'Application August 21, mildealism(55am I I r 1 dais. orm-19 8 I "Thisiinvention: relates to balance devices for tially'cataf-right ngles to; the body'plate of the slidingfwindo'wsashes, and an object of" the bracket..:

invention is to provide a balance of this char-. --Furtherrinaccordance with the present invenacter which will dispense with the'use of weights. tion thez. balance embodies a cylindrical roller Iii-accordance with the present invention the ifllof metal .or other suitable mate'rial. 1 i balance is characterized by embodying a spring -Fitt'ing within the.:respective opposite ends of roller on which is windable a length of cable the roller H! are bushings II and I2, the bushor other suitable material and to which oneend ings being provided respectively with flanges. l3 ofthe cable is anchored, the other end of the andM M, respectively, against which .the respeccable being suitably attached to thesliding sash. 1.0: this opposite; ends'ofz the roller abut.

Inaccordance with the present, invention a" The'ajbushing'sull andIIZ are rotatable on? a spring roller-equipped sash 'balance is provided shaft l5 thatlextends axially through the roller whichwill be simple, inexpensive tomanufacllliand'. the .bushings r'l l andv l2 as shown. 'At

ture; easy to install, efiicient in use, durable in therespective opposite ends thereof the: shaft I5 service, and in general an improvement on sash l5 isv provided with axial threaded sockets I6 into balances now known and generally used. which are threaded the shanks of retaining The invention, together with its objects and screws I! that also pass through openings l8 advantages, will be best understood from a stud provided, therefor in thebearing lugs 9 of the of the following description taken in connection bracket 6, to the end'that the shaft [5 is rigid with the accompanying drawings wherein; secured between said lugs 9.

Figure 1 is an elevational view of a window Housed within the roller I0 is a coil spring I 9 assembly illustrating the application of the int t s d p d eircllmjacent t e intermediate enti th r t I portion of the shaft I5 and has one'end an- Figure 2 is a plan View of a sash balance formchored to the bushing l I as atZll and a relatively. ing part of the invention. opposite end anchored to the bushing H as at M.

Figure 3 is a detail sectional view taken sub- T bushing i2 is also Provided W h 81 O stantially on the line 33 of Figure 4. cumierential series of relatively spaced radial Figure 4 is a transverse sectional view taken sockets 2 into a selected one of which astOP substantially on the line 4-4 of Figure 2. p n 23 is insertible; n 23 being p v d d int r- Figure 5 is a perspective view of a stop pin mediate its ends, and as shown in Figure 5, with forming part of the invention. a flange or collar 24 to abut the periphery of Figure 6 is a perspective View of. a bracket the bushing 1 d by limit inward moveforming part of the invention, and ent of the pin with respect to the selected Figure 7 is a detail sectional View taken subsocket 22. stantially on the line '!1 of Figure 2. When properly positioned within a selected Referring more in detail to the drawings it socket 22, the outer end of the pin 23 projects will be seen that the improved sash balances, a y b y nd e p p y of the bushin respectively indicated by the reference numeral 3 distance sufiiicient to contact the body Plate 5, are used in pairs. of the bracket 6, as shown in Figure 4, for limit- Since the balances 5 are identical a detailed 40 e rotative movement o the bushing I! in one description of one will teach the structure of directionthe other I Windable on the roller I0 is a length of cable In the preferred embodiment thereof the balor the like 25 and one end of the Cable is tened to the roller It] .as at 26 while the other 4 end thereof is fastened to a vertical rail of the lower sliding sash,*shown-in Figure 1 and indi-' h cated generally by, the reference numeral 8a, by commodate screws or 0t er fastemng elements a nail or other fastening element, as indicated through the medium of which the bracket 6' is generally at 21 secured to t e top rail; example, of P- The advantages of a sash balance embodying indow sash shown in Figure 6 d mdlcated the features of the present invention will be furance embodies a bracket 6 in the form of an elongated plate provided adjacent the respective opposite ends thereof with openings 1 to acgenerelly by reference humeral 8? ther appreciated from a description of the oper- At the respeetlve PD el'ldS thereof the ation of the sash balance as may'be briefly set body plate of the bracket 6 has bearing lugs 9, t follows; formed integral therewith, extending substan- It will be first noted that the roller I0 is positively secured to the bushing H through the medium of a set screw, or other suitable fastening element 28. Spring I9 will have a tendency to cause the roller ID to rotate in a direction for winding the cable 25 thereon. Thus it will be seen that as the window sash 8a is caused to move downwardly, the roller ID will rotate about the shaft l5 as an axis in a, direction opposing the action of the spring [.9 thus permitting the cable 25 to pay out and consequently the lowering of the sash 8a.

It will also be apparent that upon initiating upward sliding movement of the sash 8a, the tendency of the spring l9 to cause the roller III to rotate in a direction for causing the cable 25 to wind on said roller will assist upward movement of the sash so that this sliding movement up and down of the sash will be accomplished easily and smoothly.

To tighten the spring IS the bushing I2 is rotated relative to the roller ID by inserting a. pair of any suitable instruments in selected openings 22 in the bushing in order to cause a step-bystep rotation of the bushing in a direction to wind or tighten up the spring I9. When the spring H! has been placed at the sufficient tension, one end of the pin'23 is inserted in a selected opening 22 and the outer end of the pin will then abut the body plate of the bracket 6 as shown in Figure 4 to prevent rotation of the bushing I2 in a direction as would permit quick, or too-rapid unwinding of the spring.

It is thought that a clear understanding of the construction, utility and advantages of a sash balance embodying the features of the present invention will be had without a more detailed description thereof.

It is also to be understood that while I have herein illustrated and described the preferred embodiment of the invention, it is in no wise intended to restrict the invention to the precise details of construction, combination and arrangement of elements, other than may be required by the prior art and scope of the claim hereunto appended.

Having thus described the invention what is claimed as new is:

A sash balance for a window comprising a bracket adapted to be attached to the window frame at the top thereof, a shaft rigidly fixed 'to the bracket, a cable winding cylinder rotatably mounted at one end on the shaft, a cylinder tensioning spring coiled around said shaft within said cylinder and operatively connected to the cylinder to rotate the same and wind said cable. and means to variably tension said spring comprising a bushing on said shaft extending part way into the other end of the cylinderto rotatably mount said end, said bushing being rotatable on said shaft and embodying radial circumferentially spaced bores for insertion of an instrument therein selectively to rotate the bushing in a direction opposing the spring, and a pin for insertion in said bores selectively and coacting with said bracket to block rotation of the bushing in the opposite direction.

HAROLD J. BELCHER. 

